Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d76da2511fc4a7…

MALICIOUS

PDF

75.9 KB Created: 2021-07-01 15:50:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f1a38a3c7b40d9dfb8b005a709f4e83d SHA-1: 1c87d0b8e2d2eee0c52cba612b977acb0a96f5a4 SHA-256: 94d76da2511fc4a7d3ddc624d6ad5450395bda8dce28e09cee8df76cab74f2fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://oniceh.ru/uplcv?utm_term=ipot+touch+manual PDF link annotation
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d6e412781---narerasogimidanumivufajo.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/29080609447.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160871e0960b79---lefugenifo.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/24882822679.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/876ab92abd28b81bb89dbd98a6948807/56330483845.pdfIn PDF document text
    • https://wegofa.com/userfiles/file/38117108185.pdfIn PDF document text
    • http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/womawej.pdfIn PDF document text
    • https://mps-india.com/userfiles/files/nifujepanokajuwobefasopox.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160c4420bc3f54---99661951429.pdfIn PDF document text
    • https://mls.lighting/wp-content/plugins/super-forms/uploads/php/files/4db36cf804588080d7978386fdb7c2c0/dezosotukedip.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b350b94e259---kukafoteber.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/131d14853cc83d463e6f722ab16a0af7/94384081327.pdfIn PDF document text
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/d1gttu8tg4tpa7j2qcujo4ilpu/fizopozazekakesukobetog.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/e9716827009adb53a5ffc68ccc00b8ef/nezinesakibimedigoj.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/d2624f4ce7f762e5ed1f165d81574ed7/bikeretokidogogiwomenikaz.pdfIn PDF document text
    • http://freetourscadiz.com//ckfinder/userfiles/files/vesodawenokakodomipirowe.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/30597dbcb7994f69e1729d464b7f9caa/78803112365.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/diwaga.pdfIn PDF document text
    • https://criteriacambio.com.br/wp-content/plugins/super-forms/uploads/php/files/h83vh76pjpjmtba0t0cc0469fj/54075051380.pdfIn PDF document text
    • https://ambient-interier.cz/files/files/8873072458.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/24281748777.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa63a7792e1---zexowozubipanimi.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1606d57d74cc97---kudajix.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160789da7d175c---fojovib.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/a5c3c2989a5fddec07555bfde27a5034/kasotaji.pdfIn PDF document text
    • https://vigiweb.cl/dinamicos/files/file/wupeworinetofelozix.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c769.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC769 10196 bytes
SHA-256: 2a264ad201c479d8cc0583e437f465d94cbf2e33ef44f1d91bd0b0e7085a1d31
font_01_sfnt_off0000de0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF621 16584 bytes
SHA-256: adc9a93048a6a8db93d49d5947bb51eb54ccc24168a4f6c6d6204074fbcab160

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